Recovery, separation and production of fuel, plastic and aluminum from the Tetra PAK waste to hydrothermal and pyrolysis processes

Pyrolysis of Hailar lignite (moisture content ~ 34.81 wt%) was investigated at temperatures ranging from 700 °C to 900 °C in two different reactors: A tubular reactor (TR) and a continuous screw kiln reactor (CSKR). Under temperature programmed-heating conditions in the TR reactor, the auto-generated steam from the lignite moisture was vaporized and swept out of the reactor by the N2flow during the long heating process, leading to a weakened effect on the subsequent reactions. However, in the CSKR tests all the volatiles was generated continuously while avoid the carrier gas dilution , significant interactions between the in situ steam and the intermediate products occurred. Upon comparing the two pyrolysis processes, it was found the CSKR process exhibits higher H2yield of 23.23 mol/kg, H2proportion of 49.82 vol % than those (16.97 mol/kg, 41.51 vol %) from the TR process. The results demonstrated that inherent moisture in Hailar lignite had a significant influence on the product yield, depending on the pyrolysis conditions. It was also shown that increase in temperature led to rising dry gas yield and H2yield.

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High- and low-temperature pyrolysis profiles describe volatile organic compound emissions from western US wildfire fuels

10.5194/acp-2018-52 ◽

2018 ◽

Cited By ~ 2

Author(s):

Kanako Sekimoto ◽

Abigail R. Koss ◽

Jessica B. Gilman ◽

Vanessa Selimovic ◽

Matthew M. Coggon ◽

...

Keyword(s):

High Temperature ◽

Low Temperature ◽

Biomass Burning ◽

Ponderosa Pine ◽

Fine Particles ◽

Voc Emissions ◽

Western Us ◽

Volatile Organic ◽

Low Temperature Pyrolysis ◽

Pyrolysis Processes

Abstract. Biomass burning is a large source of volatile organic compounds (VOCs) and many other trace species to the atmosphere, which can act as precursors to the formation of secondary pollutants such as ozone and fine particles. Measurements collected with a proton-transfer-reaction time-of-flight mass spectrometer during the FIREX 2016 laboratory intensive were analyzed with Positive Matrix Factorization (PMF), in order to understand the instantaneous variability in VOC emissions from biomass burning, and to simplify the description of these types of emissions. Despite the complexity and variability of emissions, we found that a solution including just two emission profiles, which are mass spectral representations of the relative abundances of emitted VOCs, explained on average 85 % of the VOC emissions across various fuels representative of the western US (including various coniferous and chaparral fuels). In addition, the profiles were remarkably similar across almost all of the fuel types tested. For example, the correlation coefficient r of each profile between Ponderosa pine (coniferous tree) and Manzanita (chaparral) is higher than 0.9. We identified the two VOC profiles as resulting from high-temperature and low-temperature pyrolysis processes known to form VOCs in biomass burning. High-temperature and low-temperature pyrolysis processes do not correspond exactly to the commonly used flaming and smoldering categories as described by modified combustion efficiency (MCE). The average atmospheric properties (e.g. OH reactivity, volatility, etc.) of the high- and low-temperature profiles are significantly different. We also found that the two VOC profiles can describe previously reported VOC data for laboratory and field burns. This indicates that the high- and low-temperature pyrolysis profiles could be widely useful to model VOC emissions from many types of biomass burning in the western US, with a few exceptions such as burns of duff and rotten wood.

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Common reeds (Phragmites australis) as sustainable energy source: experimental and modelling analysis of torrefaction and pyrolysis processes

GCB Bioenergy ◽

10.1111/gcbb.12000 ◽

2012 ◽

Vol 5 (4) ◽

pp. 367-374 ◽

Cited By ~ 10

Author(s):

Francesco Patuzzi ◽

Tanja Mimmo ◽

Stefano Cesco ◽

Andrea Gasparella ◽

Marco Baratieri

Keyword(s):

Energy Source ◽

Phragmites Australis ◽

Sustainable Energy ◽

Modelling Analysis ◽

Pyrolysis Processes

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ANÁLISE DE DESEMPENHO FUNCIONAL DOS SISTEMAS DE ABERTURAS DE EMBALAGENS CARTONADAS TETRA PAK®

Plural Design ◽

10.21726/pl.v3i1.66 ◽

2021 ◽

Vol 3 (1) ◽

pp. 118-124

Author(s):

Letícia Sophia Barandiaran ◽

Maria Clara Moraes ◽

Natalha Gabrieli Moreira Carvalho ◽

Nelson Tavares Matias

Keyword(s):

A Priori ◽

Tetra Pak

O conceito de usabilidade consiste em importantes fatores que devem ser considerados na concepção e avaliação de produtos de consumo, ditando sua qualidade e eficiência de uso. Este estudo objetivou analisar o desempenho de sistemas de aberturas tipo rosca utilizados em embalagens cartonadas Tetra Pak®, buscando identificar por meio de métodos exploratórios de pesquisa a existência de fatores que influenciem no seu desempenho, além de apresentar quais sistemas exercem suas funções de forma mais eficiente. Análises exploratórias visando à identificação do volume retido na embalagem foram realizadas, e os resultados demonstraram que de forma geral os sistemas se apresentam funcionais e seus desempenhos distintos estão relacionados, a priori, à geometria do sistema de vazão.

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Tailoring the Stabilization and Pyrolysis Processes of Carbon Molecular Sieve Membrane Derived from Polyacrylonitrile for Ethylene/Ethane Separation

Membranes ◽

10.3390/membranes12010093 ◽

2022 ◽

Vol 12 (1) ◽

pp. 93

Author(s):

DaeHun Kim ◽

YongSung Kwon ◽

Jung-Hyun Lee ◽

Seong-Joong Kim ◽

You-In Park

Keyword(s):

Molecular Sieve ◽

Pyrolysis Temperature ◽

Separation Performance ◽

Carbon Molecular Sieve ◽

Alumina Support ◽

Soaking Time ◽

Polymer Precursors ◽

Pre Treatment ◽

Excellent Thermal Property ◽

Pyrolysis Processes

For ethylene/ethane separation, a CMS (carbon molecular sieve) membrane was developed with a PAN (polyacrylonitrile) polymer precursor on an alumina support. To provide an excellent thermal property to PAN precursor prior to the pyrolysis, the stabilization as a pre-treatment process was carried out. Tuning the stabilization condition was very important to successfully preparing the CMS membrane derived from the PAN precursor. The stabilization and pyrolysis processes for the PAN precursor were finely tuned, and optimized in terms of stabilization temperature and time, as well as pyrolysis temperature, heating rate, and soaking time. The PAN stabilized at >250 °C showed improved thermal stability and carbon yield. The CMS membrane derived from stabilized PAN showed reasonable separation performance for ethylene permeance (0.71 GPU) and ethylene/ethane selectivity (7.62), respectively. Increasing the pyrolysis temperature and soaking time gave rise to an increase in the gas permeance, and a reduction in the membrane selectivity. This trend was opposite to that for the CMS membranes derived from other polymer precursors. The optimized separation performance (ethylene permeance of 2.97 GPU and ethylene/ethane selectivity of 7.25) could be achieved at the pyrolysis temperature of 650 °C with a soaking time of 1 h. The separation performance of the CMS membrane derived from the PAN precursor was comparable to that of other polymer precursors, and surpassed them regarding the upper bound trade off.

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Study of the Combustion , Pyrolysis Characteristics and Synergistic Effect of Co-hydrocharsation Products of Oil Shale and Rice HuskStudy of the Combustion , Pyrolysis Characteristics and Synergistic Effect of Co-hydrocharsation Products of Oil Shale and Rice Husk

10.21203/rs.3.rs-995244/v1 ◽

2021 ◽

Author(s):

Yaoxin LIU ◽

Enyu Wang ◽

Ze KAN

Keyword(s):

Synergistic Effect ◽

Functional Groups ◽

Rice Husk ◽

Oil Shale ◽

Thermal Transformation ◽

Combustion Process ◽

Hydrothermal Temperature ◽

Fossil Energy ◽

Pyrolysis Characteristics ◽

Pyrolysis Processes

Abstract Under the pressure of environmental problems and fossil energy shortage, countries all over the world are looking for fuel to replace fossil energy. Oil shale and rice husk are potential fuels, but they both have some problems, such as high ash content and low calorific value .In the present study,oil shale and rice husk were used as feedstock for the high quality fuel through hydrothermal approach,it provides a new way for the resource utilization of oil shale and rice.Thermogravimetric method was used to analyze the functional groups change and thermal transformation characteristics of mixed hydrochars prepared for oil shale(OS) and rice husk(RH) at different hydrothermal temperatures(150,200 and 250℃), including combustion and pyrolysis processes, and analyze the synergistic effects. Results showed that the co-hydrocharsization pretreatment had a significant effect on the thermal transformation behavior of oil shale and rice husk.On the one hand, the mixture of hydrocar has higher volatile content than its calculated value.On the other hand,a synergistic effect(promoting combustion and pyrolysis behavior) was found in both combustion and pyrolysis processes, and this effect was the most obvious when the hydrothermal temperature was around 200℃,and the characteristic peak of functional groups vibration was strong.Since the synergistic effect of pyrolysis process is lower than that of combustion process, co-hydrocharsation products are considered to be more suitable for combustion.These findings have positive significance of energy generation and utilization of organic waste by the combination of co-hydrocharsization modification and subsequent thermochemical process.

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PRODUÇÃO DE COMBUSTÍVEL A PARTIR DE RESÍDUOS DE EMBALAGENS TETRA PAK EM LEITO FLUIDIZADO: IDENTIFICAÇÃO DE FATORES QUE AFETAM A MISTURA DE PARTÍCULAS DE AREIA E COMPÓSITO PEBD/AL

Brazilian Journal of Production Engineering - BJPE ◽

10.47456/bjpe.v7i5.36926 ◽

2021 ◽

pp. 133-144

Author(s):

Arthur Cesar Selvatici Filho ◽

Diunay Zuliani Mantegazini ◽

Marcelo Silveira Bacelos

Keyword(s):

Tetra Pak

Rotas integradas pirólise catalítica e refino possibilitam a conversão de poliolefinas proveniente de resíduos de embalagens cartonadas pós-consumo em combustíveis e produtos químicos de interesse comercial. Essa tecnologia contribui para a redução dos impactos ambientais decorrentes do descarte inadequado desses resíduos. Além disso, a recuperação do compósito PEBD/Al (polietileno de baixa densidade e alumínio) via pirólise permite a obtenção de produtos com altos valores agregados, tais como a parafina e alumínio com alto teor de pureza. A originalidade desta pesquisa deve-se ao desenvolvimento de uma coluna cilíndrica de leito fluidizado com um sistema de guilhotinas. A inserção de um sistema de guilhotinas a coluna cilíndrica permite avaliar a concentração axial de partículas de compósito PEBD/Al. Além disso, esta pesquisa visa investigar o efeito da velocidade de injeção do ar e da fração mássica de compósito PEBD/Al sobre o índice de mistura de partículas (Im), mediante a um planejamento experimental 3². Sob o ponto de vista da mistura de partículas no leito, a análise de resultados indica que a produção de combustível a partir de poliolefinas pode ser favorecida quando o reator é empregado com velocidade ar 25 % acima da mínima fluidização.

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